#include<stdio.h>
#define WEEKNUM 7
int main(void)
{
	int temp;
	int week[WEEKNUM]={1,2,3,4,5,6,7};
	printf("please input today is:");
	scanf("%d",&temp);
	if(temp<=WEEKNUM)
	{
		printf("tomorrow is :%d\n",week[temp]);
	}
	else
	{
		printf("error\n");
	}
	return 0;
	
 } 
